public override async Task <ICollection <FilterValue> > GetAvailableValuesAsync(IEnumerable <Guid> necessaryMIATypeIds, IFilter selectAttributeFilter, IFilter filter)
{
IContentDirectory cd = ServiceRegistration.Get <IServerConnectionManager>().ContentDirectory;
if (cd == null)
{
throw new NotConnectedException("The MediaLibrary is not connected");
}
bool showVirtual = VirtualMediaHelper.ShowVirtualMedia(necessaryMIATypeIds);
if (string.IsNullOrEmpty(CertificationHelper.DisplayMovieCertificationCountry))
{
HomogenousMap valueGroups = await cd.GetValueGroupsAsync(MovieAspect.ATTR_CERTIFICATION, null, ProjectionFunction.None,
necessaryMIATypeIds, filter, true, showVirtual);
IList <FilterValue> result = new List <FilterValue>(valueGroups.Count);
int numEmptyEntries = 0;
foreach (KeyValuePair <object, object> group in valueGroups)
{
string certification = (string)group.Key;
if (!string.IsNullOrEmpty(certification))
{
CertificationMapping cert;
if (CertificationMapper.TryFindMovieCertification(certification, out cert))
{
result.Add(new FilterValue(cert.CertificationId, cert.Name,
new RelationalFilter(MovieAspect.ATTR_CERTIFICATION, RelationalOperator.EQ, certification), null, (int)group.Value, this));
}
}
else
{
numEmptyEntries += (int)group.Value;
}
}
if (numEmptyEntries > 0)
{
result.Insert(0, new FilterValue("UR", Consts.RES_VALUE_UNRATED_TITLE, new EmptyFilter(MovieAspect.ATTR_CERTIFICATION), null, numEmptyEntries, this));
}
return(result);
}
else
{
IList <FilterValue> result = new List <FilterValue>();
IFilter emptyFilter = new EmptyFilter(MovieAspect.ATTR_CERTIFICATION);
int numEmptyItems = await cd.CountMediaItemsAsync(necessaryMIATypeIds, BooleanCombinationFilter.CombineFilters(BooleanOperator.And, filter, emptyFilter), true, showVirtual);
if (numEmptyItems > 0)
{
result.Add(new FilterValue("UR", Consts.RES_VALUE_UNRATED_TITLE, emptyFilter, null, numEmptyItems, this));
}
List <string> usedFilters = new List <string>();
foreach (var cert in CertificationMapper.GetMovieCertificationsForCountry(CertificationHelper.DisplayMovieCertificationCountry))
{
IEnumerable <CertificationMapping> certs = CertificationMapper.FindAllAllowedMovieCertifications(cert.CertificationId);
if (certs.Count() > 0)
{
List <string> certList = new List <string>(certs.Select(c => c.CertificationId).Except(usedFilters));
usedFilters.AddRange(certList);
IFilter certFilter = new InFilter(MovieAspect.ATTR_CERTIFICATION, certList);
int numItems = await cd.CountMediaItemsAsync(necessaryMIATypeIds, BooleanCombinationFilter.CombineFilters(BooleanOperator.And, filter, certFilter), true, showVirtual);
result.Add(new FilterValue(cert.CertificationId, cert.Name, certFilter, null, numItems, this));
}
}
return(result);
}
}